Bike rack



FIG. 1 is a top front right perspective view of my new design for a bike rack.

FIG. 2 is a front elevation view of my new design for a bike rack.

FIG. 3 is a rear elevation view of my new design for a bike rack; and,

FIG. 4 is a right side elevation view of my new design for a bike rack. 

The ornamental design for a bike rack, as shown and described. 